Ergo GoBook. Diagonal: 203.2 mm (8 "), Display resolution: 800 x 600 pixels, Aspect ratio: 4:3. Document formats supported: ePub, PDF, Audio formats supported: MP3, WMA, Image formats supported: BMP, GIF, JPG, PNG. Internal storage capacity: 4 GB, Compatible memory cards: microSD, Maximum memory card size: 16 GB. Interface type: USB 2.0, Headphone connectivity: 3.5 mm. Built-in processor: Boxchip E200